ISRO exam 2017 – Question 66 with Solution

In this video we are going to discuss another question which was asked in the exam of ISRO

66. Consider a disk system with 100 cylinders. The request to access the cylinders occur in the following sequences

4, 37, 10, 7, 19, 73, 2, 15, 6, 20

Assuming the head is currently at cylinder 50, what is the time taken to satisfy all requests if it takes 1 ms to move from one cylinder to adjacent one and shortest seek time first algorithm is used

(a) 95 ms

(b) 119 ms

(c) 233 ms

(d) 276 ms